Aero Precision 308 Bolt Carrier Group Complete Black Nitride APRH308186C

Carrier Features:
Machined from 8620 Tool Steel (Carrier) and 9310 Steel (Bolt)
Finish: Black Nitride - advanced lower friction coating that minimizes the need for lubricants and cleaning
Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked
Firing Pin: Machined from 8740 steel and hard chrome coated
Forward Assist serrations
Laser engraved Aero Precision logo
Carrier fits AR .308 compatible style AR Uppers and Rifles
Bolt Features:
Material: Case Hardened 9310 Steel
Finish: All bolt components are shot peened and black nitride coated
Extractor: Machined from 4340 Steel with double o-rings and double springs
Magnetic Particle Inspected and High Pressure Tested
High pressure bolt - external surfaces are CNC ground after heat treat for a precision fit and firing pin hole diameter is reduced to .070"
Multi-caliber bolt designed to function with .308, 7.62x51, .338 Federal and other .308 based cartridges.
BCG Includes:
Bolt carrier
Complete bolt
Firing pin
Cam pin
Retaining pin
Stock # APRH308186C